Hot-air furnace.



W. A. WALLACE.

HOTv AIR FURNAGE.

APPLIOATION FILED 00T. 2, 190s.

966,064. Patented Aug. 2, 1910.

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W. WALLACE.

HOT Am FURNAGE; l APPLICATION FILED 00T. 2, 1909.

966,064; f Patented Aug. 2, 1910.

- l2 SHEETS- SHEET 2. LZ?? Q S14/vento@ NTTED STATES PATENT OFFTCE.

WILLIAM A. WALLACE, 0F ALTUS, OKLAHOMA, ASSIGNOR OF ONE-FOURTH TO JOHN C. CHISUM AND ONE-FOURTH TO WILLIAM A. CI-IISUM, BOTH OF ALTUS, OKLAHOMA.

HOT-AIR FURNAGE.

Specification of Letters Patent.

Patented Auf. 2, 1910.

Application led October 2, 1909. Serial No. 520,690.

To all whom it may concern:

Be it known that I, WILLIAM A. WALLACE, citizen of the United States, residing at Altus, in the county of Jackson and State of Oklahoma, have invented certain new and useful Improvements in Hot-Air Furnaces, of which the following is a specilication.

This invention relates to hot air furnaces and has for its object to provide a strong, durable and thoroughly eflicient device of this character, the construction of which is such as to furnish a maximum amount of heat with a minimum consumption of fuel.

A further object is to provide a furnace, in which cold air under pressure is admitted into a suitable chamber and there heated and delivered to the different portions of a building, means being also provided for mixing steam with the hot air in the heating chamber in order to moisten the same.

A still further object of the invention is generally to improve this class of devices so as to increase their utility, durability and elciency.

Further objects and advantages will appear in the following description, it being understood that various changes in form, proportions and minor details of construction may be resorted to within the scope of the appended claims.

For a full understanding of the inven tion and the merits thereof and also to acquire a knowledge of the details of construction and the means for elfecting the result, reference is to be had to the following description and accompanying drawings, in which: v

Figure 1 is a longitudinal sectional view of a hot air furnace constructed in accordance with my invention; Fig. 2 is a top plan view of the same; Fig. 3 is a transverse sectional view taken on the line 3-3 of Fig. 1.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

The improved hot air furnace forming the subject matter of the present invention comprises a casing 5, preferably cylindrical in shape, as shown, and having its upper end open and provided with an annular shoulder 6 defining a reduced tubular extension 7.

Disposed within the casing 5 is a substantially conical shaped combustion chamber 8, to the apex of which is secured in any suitable manner, a draft pipe 9, which latter extends through one side of the casing 5 for connection with a chimney (not shown), there being a damper 10 arranged within the pipe 9 for the purpose of regulating the draft in the combustion chamber.

Spaced from the bottom of the casing 5, is a grate 11 of any suitable construction and disposed on opposite sides of the casing and preferably in alinement with the grate 11, are pivoted doors 12 through which fuel is admitted to the combustion chamber.

Disposed within the casing 5 and surrounding the combustion chamber 8, is a hot air chamber 13, the top of which is preferably conical in shape, while the side walls thereof are spaced from the interior walls of the casing 5 to form an annular passage 15 through which cold air is admitted to the interior of the heating chamber.

Disposed within the lower portion of the heating chamber is a tank or reservoir 16 having its inner walls spaced from the exterior walls of the combustion chamber 8 to form a hot air passage 17, which latter communicates with the passage 15 and hot air chamber 13, as shown.

Extending vertically from the top of the reservoir 16, are a series of spaced pipes or tubes 18 so that the steam generated in the reservoir 16 may enter the heating chamber 13 for the purpose of moistening the air prior to its delivery to the dierent rooms of a building. In order to fill the reservoir 16 with water, a suitable pipe 19 is provided having a funnel shaped terminal 2O and provided with a stop cock or valve 21, there being a valved drain pipe 22 extending through the walls of the casing 5 and communicating with the lower portion of the reservoir 16 to permit the water in said reservoir to be drained oftl when it is desired to use the device as a hot air furnace only.

Extending through one wall of the casing 5 is an inclined pipe or conductor 23 having one end thereof connected in any suitable manner with the pipes leading to the different rooms of a building to be heated and its other end extended through the conical top 14: of the heating chamber and provided with a flared mouth 24, the walls of which are inclined for the purpose of directing the heated air within the chamber to the conductor 23. A Hap valve Q5 is preferably disposed within the conductor 23 and a damper 2G is arranged below the valve 25, as shown.

Surrounding the tubular extension 7 and resting on the shoulder G thereof, is a cylindrical jacket 27, the latter being spaced from the member 7 to form a liquid receiving compartment 28 constituting a water seal. Slidably mounted in the compartment 28 is an air bell 29 having one or more tubes 30 formed in the top thereof and normally closed by flap valves 31 so that on the upward movement of the bell Q9, the valves 3l will open to permit the entrance of air through the tubes 30 to the interior of the tubular extension 7, and on the downward movement of the bell, the valves 31 will automatically close and retain the air within said bell. Extending laterally from opposite sides of the bell 29, are rings or runners 3Q, which latter embrace suitable guide rods 33 extending vertically from the jacket Q7 and thus assist in guiding the bell as the latter rises and falls.

As a means for elevating the bell 29, there is provided a cord or cable 34, one end of which is attached in any suitable manner to the top of the bell, while the other end thereof passes over spaced pulleys 35, and is provided with a termina-l operating handle 3G. Thus it will be seen that when a longitudinal pull is exerted on the handle 36, the bell 29 will be elevated and air admitted through the tubes 30 and valves 31 to the interior of the tubular extension 7, and when the handle is released, the weight of the bell 29 will compress the air in the tubular member 7 and force the latter downwardly within the chamber 15 and thence upwardly in the passage 17 surrounding the combustion chamber where it will receive its initial heating, a further heating of the air being effected within the chamber 13.

The pressure produced by the bell 29 as the latter descends, will force the hot air in the chamber 13 through the conductor 23, and in doing so automatically open the valve 25 so that the heated air will be distributed in the usual .manner to the different portions of a building. Then the bell ascends, the pressure being removed, the valve 25 will automatically close so as to prevent the entrance of cold air to the building. It will also be seen that the steam generated in the reservoir 16 will pass through the tubes 18 into the heating chamber 13 and thus moisten the heated air prior to its delivery to the registers or radiators of a building. By omitting the water from the reservoir 16, the device may be used as a hot air furnace. It is preferred to extend suitable pipes or conductors 37 through the walls of the casing 5 and combustion chamber 8 for attachment to a blower for the purpose of creating a draft in the combustion chamber when starting a lire.

Disposed within the combustion chamber S, is a stem or standard 38, to the upper end of which is attached a conical shaped deflector or cap 39 for the purpose of retarding the passage of the products of combustion.

lhile the device is principally designed for heating buildings and similar structures, the same may be used with equally good results for supplying cold air to a building by filling the combustion chamber with ice, the

pressure produced ,by the bell 29 causing the circulation of air around the ice in the chamber S so that the cold air will pass through the conductor 23 to said building.

Having thus described the invention, what is claimed as new is:

1. A. furnace including a casing having a combustion chamber, a heating chamber surrounding the combustion chamber and space-d from the interior wall of the casing, a conductor communicating with the interior of the heating chamber, a bell slidably mounted on the casing for forcing air under pressure downwardly between the casing and heating chamber and thence upwardly within said heating chamber, and means for raising the bell.

2. A furnace including a casing having a combustion chamber and provided with a tubular extension, a jacket surrounding said extension and spaced from the latter to form a water receiving trough, a heating chamber surrounding the combustion chamber and spaced from the interior wall of the casing to form a passage communicating with said heating chamber, a conductor communicating with the interior of the heating chamber, a bell slidably mounted in the water trough for forcing air under pressure downwardly through the top of the casing and into the heating chamber, and means for raising the bell.

3. A furnace including` a casing having a combustion chamber and provided with an annular shoulder defining a tubular eXtension, an annular jacket spaced from the tubular extension and resting on said shoulder to form a water receiving trough, a heating chamber surrounding the combustion chamber and spaced from the latter to form a` passage communicating with the heating chamber, a conductor communicating with the interior of the heating chamber, an air bell slidably mounted in the rater trough for supplying air under pressure through the top of the casing to the heating chamber, and valves carried by the bell.

l. A furnace including a casing having a combustion chamber and provided with a reduced extension, an annular jacket spaced from said extension to form a water receiving trough, a heating chamber surrounding the combustion chamber and spaced from of the heating chamber, and inwardly open- 10 the interior wall of the casing to form a ing Valves carried by the bell.

passage communicating with said heating In testimony whereof I aliX my signature elhamber, a cofnductrlir co-mmtnioting wih in presence of two witnesses.

t- 1e interior o the ieatino clam er, gui e rods extending vertically from the jacket, VILLIAM A' WALLACE' [LSl an air bell sldably mounted in the water Vitnesses:

trough for supplying air under pressure J. C. MGCLAY, through the top of the casing to the interior HARRY OLIPHANT. 

